I can't fill these gaps with correct form of "be able to"...

[Fanoos62]

I can't fill these gaps with be correct form of be able to. Can you help me?
1. I.............send any e-mails since lunchtime.
2. She used to....................speak German really well.
I don't know how do we use be able to. Please help me about it.
thanks.

 

[bhaisahab]

Is this homework? We don't do that.

 

[Fanoos62]

Is this homework? We don't do that.

No, I study English at home every day.
I'm a welder and, I work every day until late at night.
I want to travel to other country for my job and money.
I don't have time for going to English class.
Please help me.

 

[MikeNewYork]

1. I have been unable to send any e-mails since lunchtime.
2. At one time, she was able to speak German very well.

 

[Fanoos62]

1. I have been unable to send any e-mails since lunchtime.
2. At one time, she was able to speak German very well.

Hello Mike
Is it correct?
I have been not able to send any e-mails since lunchtime.

 

[MikeNewYork]

No. I have not been able to send...